Why would it burn when you pee?

Have you read this article?

http://wiki.answers.com/Q/Why_does_it_burn_after_you_pee

In addition to gonorrhea discussed in the link above, diabetes will create the same sensation. If you're thirsty also, that's most likely the answer.

In either case, it's not going to get better on it's own. Go see a doctor!

this can also be caused by a bladder infection, please visit your doctor as soon as possible to make your life moer enjoyable

Sometime, It might happen because of over heat generated in our body also. Take the juice of aloevera, if its available in your place..
or get this herbal drink in the below link
http://www.internationaldrugmart.com/herbal-products/aloesan-aloevera-drink.shtml
It'll be available in most pharmacies.. Since its herbal it doesn't have any side effects

It happens when you don't drink enough water